Coiled shutter for enclosures



ct. 31, 1939. c, M PlERsQN E1- AL 2,177,931

COILED SHUTTER FOR ENCLOSURES Filed Oct. 6, 1937 Patented Oct. 31, 1939 COILED SHUTTER FOR ENCLOSURES VCharles M. Pierson and Hal W. McPherson, Chicago, Ill., assignors to Crane Co., Chicago, Ill.,

a corporation of Illinois application october 6, 1937, serial No. 167,492

` 4 claims.l (o1. sis- 106) Thisinvention relatesto certain new and useful improvements ina coiled shutter for enclosures. Moreover, our invention relates to a simple actuating device, relatively cheaply manufactured, for

the operation of shutters suitable for radiator enclosures and the like, although adaptable, obviously, to other shutter operating means.

This invention constitutes an improvement over the pending applications, respectively identified l0 as Serial No. 109,646, filed November 7, 1936, and Serial No. 165,786, filed September 27, 1937, now respectively issued as United States Patents No. 2,101,797v and No. 2,113,240.

We have found that in many instances it may be desirable to provide for a construction which is even more simple to manufacture and more economical to produce in quantities than those constructions referred to in the above applications and patents.

We have found that a simple and economical cam displacement means for the shutter can be easily formed ina spiral or helical manner, as for example, similar to a coiled or helical spring of either tapered or cylindrical form.

We have also found that the relation of the shutter parts tothe operating means may be relatively easily made without incurring great cost and capable of substantial replacement or repair.

Other advantages and objects will become apparent upon proceeding withthe accompanying drawing, in which:

Fig. 1 is a magnified fragmentary partly sectional view of the operating mechanism embodying a preferred form of our invention and as applied to a louver or shutter plate shown in the closed position.

Fig. 2 is a view similar to Fig. l except that the shutter plate is shown in the open position.

Fig. 3 is a view taken on the line 3 3 of Fig. 1.

Fig. 4 is a modified construction showing the use of a cylindrical or spiral type of spring.'

Similar reference characters refer to similar parts throughout the various views.

Referring now to Fig. 1, the numeral l designates the wall recess of a room in which the radiator enclosure 2 employing our invention is preferably positioned and in which the `said enclosure is provided with the usual open or grilled front plate 3 through which the warm air from the 5o radiator within the enclosure passes into the room proper.

Behind the front plate 3 a shutter or louver plate 4 is positioned, preferably being hingedly suspended from a conventional hinge member 5 55 having a horizontally extending ange 6 which is suitably attached either by welding, brazing or otherwise to a complementary flange 'l on `the hinge member, the said shutter or louver plate being provided with a flange member in rim arrangement around the plate il,` the member 8 5 preferably abutting against the lower portion of the plate 3 and thus in effect serving as a vclosure passing over and behind the openings of the plate 3.

An angularly formed member 9 is attached by welding, brazing or otherwise to the underside of n 'the cover plate il, as indicated at i i, the latter being of such narrow sheet form as more clearly shown in Fig. 3, being suiciently narrow and of such proportions so as to pass or t readily between the coils of a coiled spring, as hereinafter described and as more clearly shown in Fig. 3.

The coiled spring i2, which may beof round or square stock and either of helical or helicospiral form, is provided with such predetermined number of coils as may be necessary to allow for the desired travel or displacement of the cover 4. The spring is attached, as at I3, in non-rotatable relation to the handle l 4 by means of the inserted end I5; thus by rotation of the handle M in a clockwise direction, the angle member 9 will travel upon the coil as shown in Figs. 1 and 2, and by reason of traveling between the coils at any point, the closure may be held in locked relation therebetween. At the end of the travel, in order to prevent further movement,`if desired, the coiled spring may be provided with the stop i6.

In one form of the construction, as shown in Fig. 4, by simply providing an aperture la through which the spring I 2 may extend, it is unnecessary to use the angle member 9. In such case the plate is held between. the coils of the spring vi 2 and movement of the plateis obtained in the manner described for the construction in which the angle member 9 is used.

Various modifications are obviously possible and we desire, therefore, to be limited only by the eX- tent of the claims appended hereto.

We claim:

1. An enclosure including a front plate having openings therethrough, a shutter movably mounted upon said plate for controlling the passage of air through the said openings and means for operating said shutter comprising a spring-like coiled member rotatably mounted upon and operable exteriorly of the said plate, the said coiled member cooperating with an angularly projecting portion upon said shutter for effecting the said movement of the said shutter, the said projecting portion being movable between the coils of the said coiled member upon rotation of the latter member.

2. An enclosure including a front plate having openings therethrough, a shutter movably mounted upon said plate for controlling the passage of air through the said openings and means for operating the said shutter comprising a helical coiled member of spring form rotatably mounted upon and operable exteriorly of the said plate, the said coiled member cooperating with an apertured portion of said shutter for effecting the movement of the latter, the said coiled member having a stop for limiting the open movement of the said shutter, the shutter adjacent to the said aperture portion being successively supportable yieldingly upon the coils of the said coiled member upon rotative movement of the latter member.

3. An enclosure including a front plate having openings therethrough, a shutter movably mounted upon said plate for controlling the passage of air through the said openings and means for moving the said shutter comprising a coiled spring-like single strand member rotatably mounted upon and operable exteriorly of the said plate, the coils adjacent the rotatable mounting of the said spring-like member cooperating With the said shutter whereby the said shutter may be latched against movement in closed position.

4. An enclosure including a front plate having openings therethrough, an apertured shutter movably mounted upon said plate for controlling the passage of air through the said openings and means for moving said shutter comprising a coiled spring-like single strand member rotatably mounted upon and operable exteriorly of the said plate, the coils of the said spring-like member cooperating With the apertured portion of the said shutter whereby the said shutter may be latched and supported yieldingly against substantial movement at any position intermediate to the full opening thereof.

CHARLES M. PIERSON. HAL W. MCPHERSON. 

